Programming languages and scripting languages
- C (Referenz portfind)
- C++ (Referenz Warehouse, Referenz GuG-IT Website, Referenz compow, Referenz RinD, AVATAR)
- Java (Referenz RinD)
- Python (AVATAR)
- PHP
- Pascal/Delphi
- Shell-Script (sh, csh)
- JavaScript (Referenz GuG-IT Website, Referenz compow)
Markup languages
- HTML (Referenz GuG-IT Website, Referenz compow, Referenz RinD)
- CSS (Referenz GuG-IT Website, Referenz compow, Referenz RinD)
- LESS (Referenz GuG-IT Website, Referenz compow)
Query languages
- SQL (Referenz portfind, Referenz Warehouse, Referenz GuG-IT Website, Referenz compow, Referenz RinD, AVATAR)
Build systems
- GNU/make (Referenz portfind, Referenz Warehouse, Referenz GuG-IT Website, Referenz compow)
- Ant (Referenz RinD)
- Maven
- qmake
Toolkits
- wxWidgets (Referenz Warehouse, Referenz GuG-IT Website, Referenz compow)
- Qt (AVATAR)
- Java API
Databases
- PostgreSQL incl. PL/pgSQL (Referenz Warehouse, Referenz GuG-IT Website, Referenz compow, Referenz RinD, AVATAR)
- MySQL
- SQLite (AVATAR)
Version control systems
- Git (AVATAR)
- Subversion
- CVS
IDEs and editors
- Classic Shell, VIM, GNU/make, Clang(++) or gcc
- VIM
- QtCreator (AVATAR)
- Visual Studio
- Visual Studio Studio
- Netbeans
Development for following results/solutions
- Server Development (Daemons, network programming) (Referenz compow, Referenz RinD)
- GUI Development (complex application software (Referenz Warehouse, Referenz compow, Referenz RinD))
- Database Development (Referenz Warehouse, Referenz GuG-IT Website, Referenz compow, Referenz RinD)
- Client-Server System (Referenz compow)
Development for following platforms
- FreeBSD
- OpenBSD
- Linux
- macOS
- Windows
- Via Qt for iOS and Android
Experimented with and dipped into
- Android Studio
- Xcode (für iOS)